KR100744482B1 - Device for stabilizing dc link voltage of regenerative inverter for dc traction system - Google Patents

Device for stabilizing dc link voltage of regenerative inverter for dc traction system Download PDF

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KR100744482B1
KR100744482B1 KR1020060055004A KR20060055004A KR100744482B1 KR 100744482 B1 KR100744482 B1 KR 100744482B1 KR 1020060055004 A KR1020060055004 A KR 1020060055004A KR 20060055004 A KR20060055004 A KR 20060055004A KR 100744482 B1 KR100744482 B1 KR 100744482B1
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South Korea
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voltage
bus
link
capacitor
regenerative inverter
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KR1020060055004A
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Korean (ko)
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김용기
배창한
양영철
인웅식
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한국철도기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
    • B60L9/04—Electric propulsion with power supply external to the vehicle using dc motors fed from dc supply lines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

An apparatus for stabilizing a voltage at a DC(Direct Current) link stage of a regenerative inverter for a subway substation is provided to prevent the DC link voltage of the regenerative inverter from being influenced by connecting a diode for reverse-current prevention to a DC basic wire line. An apparatus for stabilizing a voltage at a DC link stage of a regenerative inverter for a subway substation includes an electric power converting unit(14), a DC capacitor(15), a pre-charge circuit(16), and a DC link voltage detecting circuit(17). The electric power converting unit(14) generates three-phase electric power with a PWM(Pulse-Width Modulation) method through a circuit breaker(13) and is connected to one terminal of DC basic wires(11,12). The DC capacitor(15) is installed on an input terminal of the electric power converting unit(14) at a rear terminal of the circuit breaker(13). The pre-charge circuit(16) is connected to the circuit breaker(13) in parallel. The DC link voltage detecting circuit(17) is connected to the DC capacitor(15).

Description

지하철 변전소의 회생인버터 직류링크단 전압안정화장치{DEVICE FOR STABILIZING DC LINK VOLTAGE OF REGENERATIVE INVERTER FOR DC TRACTION SYSTEM}Regenerative Inverter DC Stabilization Device for Subway Substation {DEVICE FOR STABILIZING DC LINK VOLTAGE OF REGENERATIVE INVERTER FOR DC TRACTION SYSTEM}

도 1은 종래 직류모선과 회생인버터간의 구성도를 나타내는 도면,1 is a view showing a configuration diagram between a conventional DC bus and a regenerative inverter,

도 2는 본 발명에 따른 회생인버터 직류링크단 전압안정화장치의 구성도이다.2 is a block diagram of a regenerative inverter DC link voltage stabilization apparatus according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

11,12 -- 직류모선, 13 -- 차단기,11,12-DC bus, 13-breaker,

14 -- 전력변환부, 15 -- 직류 커패시터,14-power converter, 15-DC capacitor,

16 -- 프리차지회로, 17 -- DC 링크전압 검출회로,16-precharge circuit, 17-DC link voltage detection circuit,

18 -- 리액터, 19 -- 제어기,18-reactor, 19-controller,

20 -- 역류방지용 다이오드, 21 -- 모선측 직류전압검출회로.20-Backflow prevention diode, 21-DC voltage detection circuit at bus side.

본 발명은 지하철 변전소의 회생인버터에 관한 것으로, 더욱 상세하게는 지 하철 변전소에서 전동차로 구동전원을 공급하기 위해 사용되는 직류모선에서 발생되는 전압변동이 회생인버터의 직류 링크전압변동을 유발하는 것을 방지할 수 있도록 하는 지하철 변전소의 회생인버터 직류링크단 전압안정화장치에 관한 것이다.The present invention relates to a regenerative inverter of a subway substation, and more particularly, to prevent a voltage variation generated in a DC bus used to supply driving power to an electric vehicle in a subway substation from causing a DC link voltage variation of the regenerative inverter. The present invention relates to a voltage stabilizing device for a regenerative inverter DC link stage of a subway substation.

일반적으로 전동차에는 직류급전선로(직류모선)를 통해 DC 1,500V가 공급되며, 전동차가 제동중이거나 하강 경사로를 주행할 때 관성 에너지가 직류모선으로 전력을 회생하여 직류모선 전압을 상승시키게 된다.In general, a DC 1,500V is supplied to a train through a DC feed line (DC bus), and inertia energy regenerates power to the DC bus to increase DC bus voltage when the vehicle is braking or driving down a ramp.

직류모선으로 회생된 에너지는 같은 모선에 접속되어 있는 다른 전동차에서 소모된다. 그러나 동일모선에 접속된 주행중인 전동차에서 소비되는 양보다 많으면 직류모선의 전압은 상승하고 일정전압 이상이 되면 제동저항기가 동작하여 회생된 잉여 전기에너지가 열에너지로 소모된다.The energy regenerated by the DC bus is consumed by other trains connected to the same bus. However, if it is larger than the amount consumed in the running electric vehicle connected to the same bus, the voltage of the DC bus rises and when the voltage exceeds a certain voltage, the braking resistor operates to consume the surplus electric energy regenerated as thermal energy.

회생인버터는 전압상승시 에너지가 열로 소모되는 것을 방지하기 위하여 사용되는 것으로, 회생되는 전압으로 인해 직류모선 전압이 예컨대 1,850V 이상인 경우 인버터로 작동하여 직류모선의 잉여전력을 3상 교류전원모선으로 공급하여 전철용 변전소의 고압배전단에서 사용되어진다.The regenerative inverter is used to prevent energy from being consumed by the heat when the voltage rises. When the DC bus voltage is 1,850V or more due to the regenerative voltage, it operates as an inverter to supply surplus power of the DC bus to the three-phase AC power bus. It is used in high voltage distribution stage of subway substation.

종래의 회생인버터는 에너지 절감측면으로만 사용되었지만 현재는 기술의 발전으로 직류회생전력을 교류모선으로 공급하지 않는 시간에는 교류모선 측의 고조파 제거 및 무효전력보상설비로서 동작시켜 설비의 효율성을 높이고 있다.Conventional regenerative inverter has been used only for energy saving aspects, but nowadays, it is increasing the efficiency of equipment by operating as harmonic elimination and reactive power compensation equipment on AC bus side when DC regenerative power is not supplied to AC bus line due to the development of technology. .

종래처럼 회생전력을 교류모선 측에 공급하는 측면에서는 직류모선 전압이 변동하여 인버터 내부의 직류 링크전압이 변동하여도 일정전압 이하에서는 동작을 중지하여 문제가 없었지만, 고조파 제거 및 무효전력 보상기로 사용할 때는 직류 링크전압의 변동은 제어가 복잡하여지는 문제점이 발생된다.On the side of supplying regenerative power to the AC bus side as before, even if the DC bus voltage fluctuates and the DC link voltage inside the inverter fluctuates, the operation stops below a certain voltage, but there is no problem. Variation of the DC link voltage causes a problem of complicated control.

도 1은 종래 직류모선과 회생인버터간의 구성도를 나타내는 도면이다.1 is a diagram showing a configuration diagram between a conventional DC bus and a regenerative inverter.

첨부도면에 도시된 바와 같이, 직류모선(11,12)의 일단에는 차단기(13)(CB; Circuit Breaker)를 통해 절연 게이트 바이폴라 트랜지스터(IGBT; Insulated Gate bipolar Transistor)로 구성되어 PWM방식으로 3상 전력을 발생시키는 전력변환부(14)가 연결되고, 상기 차단기(13) 후단에서 전력변환부(14)의 입력단에는 직류 커패시터(15)가 연결되어 있다. 그리고 상기 차단기(13)에는 직류 커패시터(15)에 직접 직류전원측을 연결하게 되면 과도한 충전전류로 인하여 계통전압의 강하 등의 문제점이 발생하므로 충전전류를 조정하여 서서히 직류 커패시터(15)에 충전시킬 수 있도록 하는 프리차지회로(16)가 병렬로 연결되어 있고, 상기 직류 커패시터(15)에는 DC 링크전압 검출회로(17)가 연결되어 있으며, 전력변환부(14)의 출력단에는 출력파형을 정형화하고 고주파성분을 차단하기 위한 리액터(18)가 연결되어 있는 한편, 상기 DC 링크전압 검출회로(17)의 출력단에는 제어기(19)가 연결되어 이루어져 있다.As shown in the accompanying drawings, one end of the DC bus lines 11 and 12 is constituted by an insulated gate bipolar transistor (IGBT) through a circuit breaker (CB; circuit breaker), and is three-phase by PWM method. A power converter 14 for generating power is connected, and a DC capacitor 15 is connected to an input terminal of the power converter 14 at the rear end of the breaker 13. In addition, when the direct current power supply is directly connected to the DC capacitor 15, the breaker 13 may cause a problem such as a drop in the system voltage due to excessive charging current, and thus, may gradually charge the DC capacitor 15 by adjusting the charging current. The precharge circuit 16 is connected in parallel, the DC capacitor 15 is connected to the DC link voltage detection circuit 17, and the output terminal of the power conversion unit 14 to form an output waveform and high frequency A reactor 18 for blocking the component is connected, while a controller 19 is connected to the output terminal of the DC link voltage detection circuit 17.

즉, 직류모선(11,12) 측에 차단기(13)만 통하여 전력변환부(14)가 연결된 구조로서, 직류모선 전압이 일정전압 이상이 되면 전력변환부(14)가 동작하여 3상 교류전력을 발생시켜 교류모선인 3상 전원단(R,S,T)으로 전력을 공급한다. 이때 프리차지회로(16)를 통하여 우선 직류 커패시터(15)에 충전하며, DC 링크전압 검출회로(17)에 의거 직류 커패시터(15)에 일정전압 이상이 충전된 것으로 판단되면 제어 기(19)는 차단기(13)를 온상태로 접속시켜 전력변환부(14)가 회생 동작을 수행하도록 한다. 예컨대 지하철 시스템의 경우 1750V 이상에서 회생 동작을 개시하고 1650V 이하로 되는 경우는 회생 동작을 중지하도록 제어한다.In other words, the power converter 14 is connected to the DC bus lines 11 and 12 only through the breaker 13. When the DC bus voltage reaches a predetermined voltage or more, the power converter 14 operates to generate three-phase AC power. Power is supplied to the three-phase power terminals (R, S, T) that are AC buses. At this time, if the DC capacitor 15 is first charged through the precharge circuit 16 and the DC capacitor 15 is determined to be charged a predetermined voltage or more based on the DC link voltage detection circuit 17, the controller 19 The circuit breaker 13 is connected to the on state so that the power converter 14 performs a regenerative operation. For example, in the case of the subway system, the regenerative operation is started at 1750 V or more and the regenerative operation is stopped at 1650 V or less.

그런데 직류모선(11,12)과 회생인버터용 직류 커패시터(15)가 병렬로 접속되어 있기 때문에 직류모선(11,12) 전압과 직류 커패시터(15) 전압이 같게 되고, 직류모선의 전압변동이 직접적으로 전력변환부(14)의 직류 링크 전압에 영향을 주게 된다. 그리하여 전력변환부(14)가 교류모선의 전력품질 향상을 위하여 능동형 고조파 필터와 무효전력보상설비로 동작 시에 악영향을 미치게 되므로 제어 알고리즘이 복잡해지고, 고속의 응답속도가 필요한 고차수의 고조파 제거가 불가능하게 되는 문제점이 있다.However, since the DC buses 11 and 12 and the regenerative inverter DC capacitors 15 are connected in parallel, the voltages of the DC buses 11 and 12 and the DC capacitor 15 become equal, and the voltage fluctuations of the DC buses are direct. This affects the DC link voltage of the power converter 14. Therefore, the power conversion unit 14 adversely affects the operation of active harmonic filters and reactive power compensation equipment to improve the power quality of the AC bus, which complicates the control algorithm and eliminates high-order harmonics that require high-speed response speed. There is a problem that becomes impossible.

본 발명은 상기한 사정을 감안하여 발명한 것으로, 직류모선과 회생인버터 내부의 직류 링크전압이 병렬로 연결되어 직류모선 전압의 전압변동이 회생인버터의 직류 링크 전압변동을 유발하는 것을 방지하기 위하여, 회생인버터에서 직류모선 측과 접속되는 라인에 역류방지용 다이오드를 접속하여, 직류모선 측에서만 회생인버터의 직류 링크 라인으로 전류가 흐르게 함으로써 직류모선 전압의 전압변동과 무관하게 회생인버터가 교류모선측의 고조파 제거용 능동필터 및 무효전력보상설비로서 동작을 용이하도록 한 지하철 변전소의 회생인버터 직류링크단 전압안정화장치를 제공하고자 함에 발명의 목적이 있다.The present invention has been invented in view of the above circumstances, in order to prevent the DC link voltage inside the regenerative inverter from being connected in parallel so that the voltage variation of the DC bus voltage causes the DC link voltage variation of the regenerative inverter. By connecting a backflow prevention diode to the line connected to the DC bus side from the regenerative inverter, the current flows to the DC link line of the regenerative inverter only on the DC bus side, so that the regenerative inverter is harmonic on the AC bus side regardless of the voltage variation of the DC bus voltage. An object of the present invention is to provide a regenerative inverter DC link stage voltage stabilization device of a subway substation that facilitates operation as a removal active filter and reactive power compensation facility.

상기한 목적을 실현하기 위한 본 발명은, 직류모선의 일단에 차단기를 통해 연결되어 3상 전력을 발생시키는 전력변환부, 상기 차단기 후단에서 전력변환부의 입력단에 연결되는 직류 커패시터, 상기 차단기에 병렬로 연결되는 프리차지회로, 상기 직류 커패시터 양단에 연결되는 DC 링크전압 검출회로, 전력변환부의 출력단에 출력파형을 정형화하도록 연결되는 리액터, 상기 DC 링크전압 검출회로의 출력단에 연결되어 DC 링크전압의 레벨에 따라 전력변환부를 회생인버터 또는 고조파 필터/무효전력보상장치로 동작하도록 제어하는 제어기, 그리고 상기 차단기와 인버터 사이에 연결되는 역류방지용 다이오드와 직류모선 양단에 연결되어 모선전압을 검출하는 모선측 직류전압검출회로를 포함하여 이루어져 있다.The present invention for realizing the above object is a power converter connected to one end of the DC bus via a circuit breaker to generate three-phase power, a DC capacitor connected to the input terminal of the power converter in the rear end of the circuit breaker, parallel to the circuit breaker A precharge circuit connected to the DC link voltage detection circuit connected to both ends of the DC capacitor, a reactor connected to form an output waveform at an output terminal of a power converter, and a DC link voltage connected to an output terminal of the DC link voltage detection circuit. According to the controller controlling the power conversion unit to operate as a regenerative inverter or a harmonic filter / reactive power compensation device, and a DC voltage detection connected to the reverse current prevention diode connected between the breaker and the inverter and a DC bus line to detect the bus voltage. It consists of a circuit.

이하 예시도면에 의거하여 본 발명의 바람직한 일실시예에 대한 구성 및 작용을 상세히 설명한다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

첨부도면에 도시된 바와 같이, 본 발명은 종래기술과 마찬가지로 직류모선(11,12)의 일단에는 차단기(13)를 통해 PWM방식으로 3상 전력을 발생시키는 전력변환부(14)가 연결되고, 상기 차단기(13) 후단에서 전력변환부(14)의 입력단에는 직류 커패시터(15)가 연결되며, 상기 차단기(13)에는 프리차지회로(16)가 병렬로 연결되어 있다. 그리고 상기 직류 커패시터(15)에는 DC 링크전압 검출회로(17)가 연결되어 있으며, 전력변환부(14)의 출력단에는 출력파형을 정형화하고 고주파성분 을 차단하기 위한 리액터(18)가 연결되어 있는 한편, 상기 DC 링크전압 검출회로(17)의 출력단에는 제어기(19)가 연결되어 이루어져 있다.As shown in the accompanying drawings, the present invention is connected to a power conversion unit 14 for generating three-phase power in a PWM method through a circuit breaker 13 at one end of the DC bus 11, 12, as in the prior art, The DC capacitor 15 is connected to the input terminal of the power converter 14 at the rear end of the circuit breaker 13, and the precharge circuit 16 is connected to the circuit breaker 13 in parallel. In addition, a DC link voltage detection circuit 17 is connected to the DC capacitor 15, and a reactor 18 for shaping an output waveform and blocking high frequency components is connected to an output terminal of the power converter 14. The controller 19 is connected to the output terminal of the DC link voltage detection circuit 17.

이와 더불어, 본 발명은 직류 커패시터(15)와 전력변환부(14)측에 연결되는 차단기(13)의 일단에는 직류모선(11,12)에서 전력변환부(14)로만 전류가 흐르고 전력변환부(14)에서 직류모선(11,12)측으로는 전류가 흐르지 못하도록 하는 역류방지용 다이오드(20)가 추가로 연결되어 있고, 또한 상기 차단기(13)의 전단인 직류모선(11,12)측에는 모선측의 직류전압을 검출하여 제어기(19)로 전달하는 모선측 직류전압검출회로(21)가 추가로 연결되어 있다.In addition, in the present invention, a current flows only from the DC buses 11 and 12 to the power converter 14 at one end of the circuit breaker 13 connected to the DC capacitor 15 and the power converter 14. In (14), a backflow prevention diode 20 is further connected to prevent direct current from flowing to the DC bus lines 11 and 12, and the bus bus side is located on the DC bus lines 11 and 12, which is the front end of the circuit breaker 13. A bus side DC voltage detection circuit 21 for detecting a DC voltage of the DC voltage and transmitting it to the controller 19 is further connected.

이와 같이 구성된 본 발명의 작용을 설명하면, 프리차지회로(16)를 통해 직류 커패시터(15)에 프리차지가 이루어지고, 이러한 프리차지전압은 직류 커패시터(15) 양단에 걸리는 전압을 검출하는 DC 링크전압 검출회로(17)에 의해 검출되어 제어기(19)로 입력된다.Referring to the operation of the present invention configured as described above, the precharge is made to the DC capacitor 15 through the precharge circuit 16, this precharge voltage is a DC link for detecting the voltage across the DC capacitor 15 It is detected by the voltage detection circuit 17 and input to the controller 19.

제어기(19)는 상기 프리차지전압이 사전에 설정된 프리차지전압 이상으로 충전되는 경우 차단기(13)를 온상태로 접속시켜 회생전력을 흡수 또는 고조파 필터와 무효전력보상기로서 동작준비상태로 만든다.The controller 19 connects the circuit breaker 13 to the on state when the precharge voltage is charged above a preset precharge voltage, thereby making the regenerative power absorbed or ready to operate as a harmonic filter and reactive power compensator.

이후, 모선측 직류전압검출회로(21)에 의해 검출되는 직류모선전압은 제어기(19)로 전달되어 제어기(19)에서 직류모선의 전압레벨을 판단하게 되는데, 이때 직류모선 전압이 일정전압 이상이 되는 것으로 판단하면, 예컨대 직류 전동차의 경우 1650V 이상이 되면, 이 경우에는 직류 커패시터(15)와 전력변환부(14)가 회생인버터로 동작하여 내부의 DC 링크전압이 직류모선(11,12) 전압과 연동하여 변화하면 서, 3상 교류전력을 발생시켜 교류모선인 3상 전원단(R,S,T)으로 전력을 공급한다. Thereafter, the DC bus voltage detected by the bus side DC voltage detection circuit 21 is transmitted to the controller 19 to determine the voltage level of the DC bus in the controller 19, where the DC bus voltage is equal to or higher than a predetermined voltage. If it is determined that, for example, in the case of a DC electric car is 1650V or more, in this case, the DC capacitor 15 and the power conversion unit 14 operates as a regenerative inverter, the internal DC link voltage is the DC bus voltage (11, 12) It changes in conjunction with and generates three-phase AC power and supplies power to three-phase power terminals (R, S, T), which are AC buses.

한편, 제어기(19)가 모선측 직류전압검출회로(21)에서 수신되는 직류모선 전압의 판단결과 직류모선(11,12) 전압이 일정치 못한 경우, 즉 1650V 이하로 떨어진 경우, 직류 전력변환부(14) 등으로 이루어지는 회생인버터를 고조파 필터 및 무효전력보상장치로 작동시키게 되고, 이때에는 교류모선측에서 직류 커패시터(15)측으로 DC 링크전압을 공급하여 직류모선측의 전압과 무관하게 일정하게 DC 링크전압을 유지시킨다.On the other hand, when the controller 19 determines that the DC bus voltages received by the bus side DC voltage detection circuit 21 are not constant, that is, when the voltage falls below 1650 V, the DC power converter The regenerative inverter consisting of (14) is operated as a harmonic filter and reactive power compensation device.In this case, the DC link voltage is supplied from the AC bus side to the DC capacitor 15 side so that the DC constant voltage is constant regardless of the voltage on the DC bus side. Maintain link voltage.

상기한 바와 같이 본 발명은 직류모선 라인에 역류방지용 다이오드를 직렬로 접속함으로써 DC 직류모선 전압이 직류 커패시터 전압보다 낮은 경우는 회생인버터 DC 링크전압에 영향을 주지 않는 장점이 있다.As described above, the present invention has an advantage of not affecting the regenerative inverter DC link voltage when the DC DC bus voltage is lower than the DC capacitor voltage by connecting the reverse current prevention diode to the DC bus line in series.

Claims (1)

직류모선의 일단에 차단기를 통해 연결되어 3상 전력을 발생시키는 전력변환부, 상기 차단기 후단에서 전력변환부의 입력단에 연결되는 직류 커패시터, 상기 차단기에 병렬로 연결되는 프리차지회로, 상기 직류 커패시터 양단에 연결되는 DC 링크전압 검출회로, 전력변환부의 출력단에 출력파형을 정형화하도록 연결되는 리액터, 상기 DC 링크전압 검출회로의 출력단에 연결되어 DC 링크전압의 레벨에 따라 전력변환부를 회생인버터 또는 고조파 필터/무효전력보상장치로 동작하도록 제어하는 제어기, 그리고 상기 차단기와 인버터 사이에 연결되는 역류방지용 다이오드와 직류모선 양단에 연결되어 모선전압을 검출하는 모선측 직류전압검출회로를 포함하여 이루어진 지하철 변전소의 회생인버터 직류링크단 전압안정화장치.A power conversion unit connected to one end of the DC bus via a breaker to generate three-phase power, a DC capacitor connected to an input end of the power conversion unit at the rear end of the breaker, a precharge circuit connected in parallel to the breaker, and both ends of the DC capacitor DC link voltage detection circuit to be connected, a reactor connected to form an output waveform to the output terminal of the power conversion unit, connected to the output terminal of the DC link voltage detection circuit, the power conversion unit regenerative inverter or harmonic filter / invalid according to the level of the DC link voltage Regenerative inverter DC of the subway substation comprising a controller for controlling to operate as a power compensation device, and a DC voltage detection circuit connected to both ends of the reverse current prevention diode connected between the breaker and the inverter and connected to the DC bus line to detect the bus voltage. Link level voltage stabilizer.
KR1020060055004A 2006-06-19 2006-06-19 Device for stabilizing dc link voltage of regenerative inverter for dc traction system KR100744482B1 (en)

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KR100964631B1 (en) * 2008-04-29 2010-06-22 한국철도기술연구원 Power supply system for an electric rail car having function for stabilizing voltage of a wire
KR101119128B1 (en) 2010-01-22 2012-03-20 동산엔지니어링 주식회사 Power supply apparatus for light rail transit using utility interactive photovoltaic generation

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JPH05338481A (en) * 1992-06-09 1993-12-21 Nissin Electric Co Ltd Feeding method for ac electric railway
KR19990062128A (en) * 1997-12-31 1999-07-26 추호석 Main power inverter
KR20000046001A (en) * 1998-12-31 2000-07-25 추호석 Recovery invertor apparatus of railroad vehicle
JP2002369306A (en) 2001-06-04 2002-12-20 Railway Technical Res Inst Electric brake device of electric rolling stock

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JPH05338481A (en) * 1992-06-09 1993-12-21 Nissin Electric Co Ltd Feeding method for ac electric railway
KR19990062128A (en) * 1997-12-31 1999-07-26 추호석 Main power inverter
KR20000046001A (en) * 1998-12-31 2000-07-25 추호석 Recovery invertor apparatus of railroad vehicle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100964631B1 (en) * 2008-04-29 2010-06-22 한국철도기술연구원 Power supply system for an electric rail car having function for stabilizing voltage of a wire
KR101119128B1 (en) 2010-01-22 2012-03-20 동산엔지니어링 주식회사 Power supply apparatus for light rail transit using utility interactive photovoltaic generation

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